Why not go directly to the QTel in Al Saad and file the complaint, make sure you do not go out the office untill they make sure, you get connected and tell them you would be started to be charge without connection yet, take the name of the persons you talked to to ensure you have talked to someone not just pointing out to the number you are calling.

  Please let us know what would happen next...

"There's nothing we can do to change the past, if it teaches  you a lesson profit from it then, forget it."